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#geochemistry

1 post1 participant0 posts today
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bse

Aqueous #geochemistry this semester! We've moved from simple fluid-mineral equilibria to more complex models. As a teaching tool, I developed with help of our Uni's IT folks, an online portal to #USGS model software, WEB-PHREEQ. Anyone can use this.

Of course the students download the more capable desktop version for their projects (also, yes, I know there are more advanced portals out there). #geology

ndsu.edu/webphreeq/

www.ndsu.eduWelcome to Web-phreeq - aqueous geochemical modelingPHREEQC, low temperature aqueous geochemistry, modeling, modelling, web-phreeq, wateq, water, Department of Geosciences, North Dakota State University, Fargo, ND, USA.
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Ele Willoughby, PhD

Happy birthday to #geochemist Charles David Keeling (1928 - 2005) whose decades long observations of CO2 in air samples from Mauna Loa Observatory were some of the 1st direct data to show the human contribution to greenhouse effect & global warming. The ‘Keeling Curve’ (in copper & red) shows both the seasonal variations (the wiggles) & the strong upward trend with time as the greenhouse gas built up in the atmosphere. 🧵

Linocut portrait of Keeling in teal with geochemical sampling tools with the Keeling curve in copy and axes (vertical: CO2 fraction micro-mol/mol from 325 to 400 and horizontal: Year 1960 to 2000).
#linocut#printmaking#climateChange
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💧🌏 Greg Cocks

Critical Minerals In Ores (CMiO) Database
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lnkd.in/gynRjUfn <-- shared USGS publication
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lnkd.in/gETca3DQ <-- shared link to open data database, web map services, etc
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portal.ga.gov.au/persona/cmmi <-- shared web map
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lnkd.in/gdmMp2zg <-- shared editorial piece on critical minerals and geopolitics
--

@USGS | @GeoscienceAustralia | @GeologicalSurveyOfCanada

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💧🌏 Greg Cocks

The GEOROC Database (Geochemistry of Rocks of the Oceans and Continents)
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georoc.eu/georoc/new-start.asp <-- shared link to GEOROC resource
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H/T Paul Cleverley glasses curly blonde hair
“The GEOROC Database (Geochemistry of Rocks of the Oceans and Continents) is a comprehensive collection of published analyses of igneous and metamorphic rocks and minerals. It contains major and trace element concentrations, radiogenic and nonradiogenic isotope ratios as well as analytical ages for whole rocks, glasses, minerals and inclusions. Metadata include geospatial and other sample information, analytical details and references….
Current content of GEOROC:
• 22,750 papers
• 685,660 samples
• 2,680,100 analyses
• 39,334,100 single data values…”

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Bill Minarik

Jonathan O'Neil of the University of Ottawa telling the story of the Hadean mantle and crust from the few scraps of rocks left to us from that time. Short- and long-lived isotopic systems constrain the timing and processes of the Earth's first crust. The second keynote at the Geotop annual meeting, hosted at ÉTS.

Jonathan O'Neil of the Univ. Ottawa introducing the ancestry of Earth's crust.
A slide illustrating the radioactive decay of isotopes present at the Earth's formation.
#UOttawa#ETS_Montreal#Geotop
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Planetary Ecologist

Geochemistry (Earth sciences 🌍)

Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans.: 1 The realm of geochemistry extends beyond the Earth, encompassing the entire Solar System, and has made important contributions to the understanding of a number of processes including mantle convection, the forma...

en.wikipedia.org/wiki/Geochemi

en.wikipedia.orgGeochemistry - Wikipedia
#Geochemistry#EarthSciences
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💧🌏 Greg Cocks

Edge Of Mars’ Great Dichotomy Eroded Back By Hundreds Of Kilometres
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arstechnica.com/science/2025/0 <-- shared technical article
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dx.doi.org/10.1038/s41561-024- <-- shared paper
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images - Morphological similarities between the stratigraphy in the mounds and the Mawrth Vallis plateau region
3D model, map, images and charts - Chemostratigraphy and morphostratigraphy of a well-exposed mound
3D map and cross section - Three-dimensional view of study area with stacked elevation profiles
image/map - the topography of Mars by the Mars Orbital Laser Altimeter (MOLA)
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